Setup Guide

Data Center Bridging: Default Conguration..............................................................................................................276
Conguring Priority-Based Flow Control.................................................................................................................... 276
Conguring Lossless Queues........................................................................................................................................277
Conguring PFC in a DCB Map................................................................................................................................... 279
PFC Conguration Notes........................................................................................................................................279
PFC Prerequisites and Restrictions.......................................................................................................................280
Conguring PFC without a DCB Map.........................................................................................................................280
Conguring Lossless QueuesExample:..................................................................................................................280
Priority-Based Flow Control Using Dynamic Buer Method..............................................................................282
Behavior of Tagged Packets.........................................................................................................................................283
Conguration Example for DSCP and PFC Priorities................................................................................................283
SNMP Support for PFC and Buer Statistics Tracking............................................................................................284
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................285
PFC and ETS Conguration Examples........................................................................................................................286
Using PFC to Manage Converged Ethernet Trac...................................................................................................286
Operations on Untagged Packets................................................................................................................................286
Generation of PFC for a Priority for Untagged Packets........................................................................................... 287
Congure Enhanced Transmission Selection..............................................................................................................287
ETS Prerequisites and Restrictions........................................................................................................................287
Creating an ETS Priority Group..............................................................................................................................287
ETS Operation with DCBx......................................................................................................................................288
Conguring Bandwidth Allocation for DCBx CIN................................................................................................ 289
Conguring ETS in a DCB Map............................................................................................................................. 290
Hierarchical Scheduling in ETS Output Policies..........................................................................................................291
Using ETS to Manage Converged Ethernet Trac....................................................................................................291
Applying DCB Policies in a Switch Stack.................................................................................................................... 292
Congure a DCBx Operation........................................................................................................................................292
DCBx Operation....................................................................................................................................................... 292
DCBx Port Roles...................................................................................................................................................... 292
DCB Conguration Exchange................................................................................................................................ 294
Conguration Source Election................................................................................................................................294
Propagation of DCB Information........................................................................................................................... 295
Auto-Detection and Manual Conguration of the DCBx Version...................................................................... 295
DCBx Example......................................................................................................................................................... 295
DCBx Prerequisites and Restrictions.....................................................................................................................296
Conguring DCBx....................................................................................................................................................296
Verifying the DCB Conguration................................................................................................................................. 300
QoS dot1p Trac Classication and Queue Assignment..........................................................................................308
Conguring the Dynamic Buer Method................................................................................................................... 309
Sample DCB Conguration........................................................................................................................................... 310
PFC and ETS Conguration Command Examples............................................................................................... 312
13 Dynamic Host Conguration Protocol (DHCP)..........................................................................................313
DHCP Packet Format and Options.............................................................................................................................. 313
Assign an IP Address using DHCP................................................................................................................................315
Implementation Information.......................................................................................................................................... 316
Contents
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